Can I use RS-485 port as RS-232

I have a PCI-485/2 board. I have one of the ports connected to a devices using RS485 protocol. Can I use the other port and connect it to a RS232 device?

The physical transceivers for RS-232 and RS-485 are different, and thus are not configurable. With regards to the converter, I do not have any specific recommendations, but a quick glance at the B&B Electronics catalog shows a couple of dozen different options that run from $70-$125. Which model you need will depend on the features you're looking for: connectors, max baud rate, surge protection, power source, isolation, etc.

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Can I use the ethernet port ....

Can I use the ethernet port on the ATV to connect my blue ray p[layer to the internet using the ATV as a wireless card??
If so how??

I might be next in line on the airport extreme! Right now wireless is working better since the latest upgrade to iTunes, but hardwire is the way to go. Only problem is that ISP connections is in my office and my Home Media is downstairs. I was thinking of setting the Airport Extreme as a repeater in order to access ISP and then used the ports in the back for iTunes and ATV.

Can I use the Ethernet Port for a computer when it is also used as a wireless network with an Airport Extreme as the access point for the wireless network

Can I use the Ethernet Port of the A1264 Airport Express to connect to the Ethernet port of a computer that does not have wireless capability when the Airport Express is also used on a wireless network with an Airport Extreme 5th generation as the access point for the network?
I have AE 5th gen
looking to buy (from ebay) the AEX A1264
Various computers, printers and hubs for the network
Is this possible to do?

Bob, Thanks for the info. I have read different articles that said yes, but I wanted to make sure before I commit to buy. I have an older A1084 which I could not use the Ethernet port. I know at one point I was able to when I was on 10.4. Now that I am on an Intel processor and 10.8 I am going to have to upgrade some of my Apple wireless hardware.
Thanks Again.

How can i use the parallel port

I was wondering how to adress my PC´s
parallel port. I did'nt find a suitable
VI in the palettes.
Do I have to read/write somehow directly
to the port adress in memory 0378 ...?
If so, how can this be done ?
Thanks for any help,
Holsch

Use VISA to read/write to the parallel port just like you would read/write
to the serial port. I would staty away from the inport/outport stuff. I believe
there's some articles in the KnowledgeBase if you get stuck.
[email protected] (Helmut Hullen) wrote:
>Hallo, Holger,>>Du meintest am 29.07.00 zum Thema how can i use the parallel
port>> I was wondering how to adress my PC's>> parallel port. I did'nt
find a suitable>> VI in the palettes.>>Look at "in port" and "out port".>Under
Windows NT/Windows 2000 you need a special library for direct port >access,
look for "hwaccess" or "accesshw".>>Viele Gruesse!>Helmut>

Cisco 3750X -- 10G uplink - Can be used as access port?

Dear All,
I have small question, I am planning for Cisco 3750X with 10G SFP+ service module. I want to know that whether it can be used as Access Ports connecting to server as this is mostly used as uplink port.
Thank You,
Abhisar.

Disclaimer
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Posting
Well if you want to connect anything with 10g to a 3750X, you're limited to using a module with 10g ports.
Other than 10g capability on some module cards, something to note, the module ports, I believe, are supported by larger buffers (including the gig module ports).
As the others have noted, you can use any port for any purpose. However, if you connect a server to a 10g port, be aware you might start to see drops on your other host (gig) ports as the server will now be able send faster than the host port can receive data. To minimize this, you might either disable QoS on the switch (providing maximum buffers to all egress traffic) or you might need to tweak buffer resource settings (the default settings often drop some packets, when there are bursts, of default marked packets).

Can we use the air port time capsule to stream iTunes videos through an iPad?

Can we use the air port time capsule to stream iTunes videos through an iPad?

dean earl wrote:
Can we use the air port time capsule to stream iTunes videos through an iPad?
On what device do those iTunes videos reside?

Measure data using RS-485 Port on cFP-2120

I have cFP-2120 with one RS-485 Port, One RS-422 and one RS-232 Port available, i want to measure data using the exisiting RS-485 Port on cFP-2120.
I have Rx and Tx Signals from my equipment. Two wire
Also i have RS-485 Enabled device with 4 port availble. I want to use RS-485 connected with RJ-50.
Also give me pinouts for Rx and Tx.
Thanks.

I am a little confused by your statement "I have cFP-2120 with one RS-485 Port, One RS-422 and one RS-232 Port available". The cFP-2120 has 3 RS-232 ports and only 1 RS-485 (or RS-422).
Look in the manual for the cFP-2120. Here is a link. http://www.ni.com/pdf/manuals/371380b.pdf Pages 3-7 thru 3-10 have information and pinouts for the serial ports. It also tells how the RS-485 port is a 4-wire port, but it can connect to a 2-wire RS-485 installation with jumpers and special programming to account for the echo back of outgoing commands. Another alternative to 4-wire to 2-wire conversion is to get an RS-485 isolator that would have switches to set one side to 4-wire and the other side to 2-wire. I have used this one from B&B electronics successfully. Though you say you are using 4-wire on your device, so you would not need it unless you have the need for electrical isolation between the device and your cFP. Perhaps the discussion of 2-wire was a misunderstanding.
Remember that the transmit lines from your device will go to the receive lines of your cFP and vice versa. The polarity of + and - should match between the two devices. TX+ to RX+, TX- to RX-, RX+ to TX+, RX- to TX-, and GND to GND)
As for VISA, you would just configure it like you would any RS-232 device with the baud rate, parity, and stop bits to match your device.
Centerbolt, thanks for the kind words and posting the link to the other thread.

Copy ftp start -- can we use a nondefault port?

I have a limited availability of server assets and IP addresses and would like to separate the folders for anonymous general ftp connections and those used for router maintenance. Can I use port 2121 for example: copy ftp://[email protected]:2121/startup.txt start I tried it and it always goes to the IIS FTP site that is running port 21.
IOS version is c2800nm-adventerprisek9-mz.124-19.bin

Many routers provide an ALG on port 21 to listen on FTP commands to sniff out the port that needs to be open for active mode to work. However, that only works on port 21 in most causes.... so it doesn't work on non-standard
ftp ports.
Your can setup your FTP server for passive mode FTP (you'll need to forward an additional range of ports to the computer running the FTP server, specify within IIS to use those forwarded ports, and tell IIS to use
your WAN ip as the passive mode ip).

Can I use the IR port to receive other data

HI I wonder if it is possible to use the IR port on my 2.4Ghz Core Duo Imac to import data from the IR transmitter on my Aviva Accu Chek blood glucose Monitor? Any suggestions would be much appreciated. I have very few tech. details about the Accuchek, some ideas of how to access the IR port would be great as a starting point
Thanks for the help Peter T

I doubt it can or there would be other hardware which may use it.
I think the problem you will have is if it can transmit the data and has been sent to your mac how would you open the data?
You need an app to access it.
But it maybe worth seeing if the diabetic app you get on the mac can understand the data it sends.

Can i use one thunderbolt port as a video input?

so i just bought a Late 2013 21,5" iMac, and i know that thunderbolt techonlogy accept output and input, so, can i use it to connect another device and use mi imac as a reciever? if not, WHY? APPLE, PLEASE put this feature on an update now!

Welcome to Apple Support Communities
You can. It is called Target Display mode, but on a Thunderbolt iMac like your Mac, it only works with other Thunderbolt Macs (Late 2009 and Mid 2010 27-inch iMacs could be used as an external display for some PCs and even for a Xbox 360 or PlayStation 3). See > http://support.apple.com/kb/HT3924?viewlocale=en_US&locale=en_US
You are not talking to Apple here. Instead, you can send feedback to them > http://www.apple.com/feedback

How can we use the SDXC PORT ?

Hi,
Im intending to buy a Macbook pro 15" and i wonder how can i use the SDXC to boot my future macbook.
I heard there is out there some cards to make it boot faster. I am not talking here about sd camera cards.
And do you think i made the right choice by choosing the 15" 2.2 ghz i7 ?
Thank you

fane_j wrote:
There's only one way to make your "mac faster and use it every day"—replace the internal disk drive with an SSD, or replace the internal SSD with a bigger and faster SSD.
Disk I/O has alwas been the main bottleneck of all computers. So you either make it occur faster or you reduce de times it needs to occur.
In the "faster" section, the issues I have with SSDs are several:
Their price still needs to go down way more. The cost per MB of SSD-based storage is still vastly greater than that of HDDs. Yes, if you compute in extreme environments like karting down Baja or skydiving off the Himalayas, a ruggedized SSD is great, but most of us mortals live in the safe confines of a homey office.
The size of SSDs has to expand much more. Yes, they are inching up to the 500GB size, but HDDs are at 1TB and promise to break that barrier before the year is out.
If you purchase your SSD preinstalled in your Mac, you will be paying a big premium, compared to marketplace SSDs, even those from the same maker but not Apple-branded. This also applies to RAM.
If you put in a non-Apple-branded SSD, Lion will not enable TRIM support by default and you will have to go "under the hood" to enable it. Without TRIM, you will not get the full performance and durability benefit of an SSD.
Might be me, but I prefer to stick with HDDs for now, just making sure they are of 7200RPM spindle speed.
In the "reduce" section, must point out that Lion is a 64-bit beast. Meaning that all data structures are twice the size of previous 32-bit cats. Regardless of "minimum" specs, 4GB RAM is the new practical minimum and 8GB makes the fat cat much happier. But buying RAM from Apple is not a financially wise decision; an 8GB upgrade from reputable vendors can be had for around $40, in stark comparison to the $200 premium charged by the Apple store. For the same $200 or a bit less, you can get a 16GB upgrade instead, not officially sanctioned but that works just fine with the latest model Macs. In this case, I don't think the OP will need as much, but it is something to take under consideration. The extra RAM will drastically reduce the disk-based paging that the memory management carries out, thereby minimizing that bottleneck.

I can not use the Ethernet Port to connect another device. My Airport Express allowed me to do this.

I want to use the Ethernet Port for my Apply TV for another device (Direct TV box), but it doesn't work. I have Airport Express with an Ethernet port and I was able to plug my Direct TV box to download.

It's not designed to extend a network, and plugging in ethernet disables wi-fi in any case.
AC

Can i use the HDMI port and the Mini displayport to HDMI adapter simultaneously to switch between two displays?

I just bought a new Mac Mini and was hoping that i can connect my TV via the HDMI port and also connect a 19" monitor via the Minidispaly port to HDMI adapter or the Mini DisplayPort to VGA Adapter. This way i can pick between having the screen mirrored to my tv, or having the screen displayed at my desk.
Is this possible?

Yes. Note the resolution via HDM is limited to
This model simultaneously supports 1920x1200 on an HDMI or a DVI display (using the included HDMI-to-DVI adapter) and2560x1600 on a Thunderbolt or Mini DisplayPort display or even a VGA display (with an optional Mini DisplayPort-to-VGA adapter, which is compatible with the Thunderbolt port).
HD 4000 Mini Video

Can I use the LAN port of my Airport Express, which is being used to extend my wi-fi network from my Time Capsule?

I have a home wi-fi network based on a Time Capsule (3rd Gen.). I recently added a new "n" Airport Express to extend my wi-fi coverage to areas of my home where the signal has been weak or non-existant. The setup went very well (Airport Utility 6 on my MacBook Pro running Mtn. Lion) and was extremely simple and trouble free. Now I am attempting ot plug an ethernet device (internet bridge reciver from a wirelss weather station) into the LAN port. The weather station instructions say the device should communicate fine plugged directly into my router (not physically available where the device needs to be) OR plugged into a LAN port of an ethernet hub. My question is then: with the Airport Express in wi-fi extend mode, is the LAN port available to cable internet devices into the network?

My question is then: with the Airport Express in wi-fi extend mode, is the LAN port available to cable internet devices into the network?
Yes, assuming that the setup went correctly.
Test by moving your laptop or other computer close to the AirPort Express. Temporarily, turn off the wireless on the laptop and connect it using a spare Ethernet cable to the LAN port on the Express.
See if you can get an Internet connection. If you can, you know the Express has been configured and is functioning correctly.
Since the Express is in bridge mode when it "extends" both ports become LAN ports, so if you have a second device that needs an Ethernet connection, connect it to the WAN port as it will work as well.

Can't use ch340g serial port driver since upgrading to Yosemite on MacBook air

I use my MacBook air with the Arduino 1.0.6 IDE. Since upgrading ( free upgrade) to Yosemite. I can no longer acess the ch340g serial port. (does not show up in arduino ide). I tried re-installing the driver. I get no errors and am told the install was successful. This was working very nicely before the upgrade. I now have three boards I cannot use. I am at a loss as to what I should do. I suppose I could go back to Maverick but then I would have to go buy the operating system. This seems wrong to me. I was offered an upgrade that then leaves me up the creek without a paddle. Any help given would be highly appreciated.

I have the same problem, a non stable CM341 serial to tty driver on Yosemity on a MacbookPro Retina.
I followed the advice of Rsattaur, I executed the command: sudo nvram boot-args="kext-dev-mode=1" and now I have big problems with my USB-ports.
The result is a screen-of-death after connecting anything to my USB-ports!!!!
Harold

Can I use RS-485 port as RS-232

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